If polar bears were extincthow will it effect humans?

Well, polar bears eat seals. If all polar bears got killed and disappeared, then the seal population would rapidly increase, and then all the food for the seals would decrease because there's so many seals. So to sum up, having polar bears killed off would greatly decrease seals food, then the seals food would disappear, and then the seals would starve to death themselves. It's kind of scary isn't it...